EP0654839B1 - Festoxidelektrytbrennstoffzelle - Google Patents

Festoxidelektrytbrennstoffzelle Download PDF

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Publication number
EP0654839B1
EP0654839B1 EP94118061A EP94118061A EP0654839B1 EP 0654839 B1 EP0654839 B1 EP 0654839B1 EP 94118061 A EP94118061 A EP 94118061A EP 94118061 A EP94118061 A EP 94118061A EP 0654839 B1 EP0654839 B1 EP 0654839B1
Authority
EP
European Patent Office
Prior art keywords
dimple
solid oxide
oxide electrolyte
power generation
height
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94118061A
Other languages
English (en)
French (fr)
Other versions
EP0654839A1 (de
Inventor
Tokuki c/o Kobe Shipyard & Mach. Works Satake
Hitoshi c/o Takasago Res. & Dev. Center Miyamoto
Kiyoshi c/o Kobe Shipyard & Mach. Works Watanabe
Fusayuki c/o Kobe Shipyard & Mach. Works Nanjo
Koichi c/o Kobe Shipyard & Mach. Works Takenobu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
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Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Publication of EP0654839A1 publication Critical patent/EP0654839A1/de
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
    • H01M8/241—Grouping of fuel cells, e.g. stacking of fuel cells with solid or matrix-supported electrolytes
    • H01M8/2425—High-temperature cells with solid electrolytes
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M8/12—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
    • H01M8/1231—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte with both reactants being gaseous or vaporised
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
    • H01M8/241—Grouping of fuel cells, e.g. stacking of fuel cells with solid or matrix-supported electrolytes
    • H01M8/2425—High-temperature cells with solid electrolytes
    • H01M8/2432—Grouping of unit cells of planar configuration
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
    • H01M8/2457—Grouping of fuel cells, e.g. stacking of fuel cells with both reactants being gaseous or vaporised
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Definitions

  • the present invention relates to a SOFC (solid oxide electrolyte fuel cell) and, more specifically, to a SOFC as defined in the preamble portion of the claim which can be used as a cell for water electrolysis, CO 2 electrolysis and other electrolyses, as well as for power generation.
  • SOFC solid oxide electrolyte fuel cell
  • the present inventors have proposed a structure in which an oxygen electrode layer and a fuel electrode layer are jointed to the respective faces of a solid oxide electrolyte layer to constitute a 3-layered power generation layer and the power generation layer is formed with a number of dimples on both sides in Japanese Laid-open Utility Model Application No. Hei. 4-8259 and Japanese Laid-open Patent Application No. Hei. 6-215778 both entitled "Solid Oxide Electrolyte Fuel Cell.”
  • the former simply proposes provision of the dimples, and the latter is directed to optimization of electrical connection between the dimples and interconnectors.
  • JP-A 22 76 166 Another prior art solid electrolyte fuel cell is described in JP-A 22 76 166.
  • the projections are formed only in a solid electrolyte plate and the current collectors are arranged as plates on the peakes on both sides of the solid electrolyte plate. No mention is made as to the specific structure and arrangement of the projections with respect to providing optimum values of the projection diameter, height and pitch under consideration of the flow of oxygen and fuel gas in accordance with the pressure loss.
  • An object of the present invention is to provide a solid oxide electrolyte fuel cell in which the power output performance is improved.
  • Another aspect of the invention is to enable selection of a dimple shape in accordance with applications such as a large-capacity application and a closed-space, small-capacity application.
  • the main point is how to increase the reaction area for a certain fixed capacity. Further, a consideration needs to be given to a gas flow.
  • dents in other words, protrusions that are arranged on the power generation layer constituted of the three layers of the fuel electrode, solid oxide electrolyte and oxygen electrode should be circular for the gas flow, and rectangular for the reaction area.
  • the protrusions i.e., the outer surfaces of the dimples are required to have a shape similar to a cylinder.
  • the height of the protrusions is also an important factor.
  • FIG. 1 is an exploded perspective view
  • Fig. 2 is an enlarged sectional view taken along line A-A in Fig. 1
  • Fig. 3 is a sectional view in an assembled state.
  • symbols 11A and 11B denote power generation layers; 12, a fuel electrode; 13, a solid oxide electrolyte; 14, an oxygen electrode; 15A, dimple protrusions on the hydrogen (the fuel) side; 15B, dimple protrusions on the oxygen side; and 16A to 16C, interconnectors.
  • Each of the power generation layers 11A and 11B consists of the fuel electrode 12, solid oxide electrolyte 13 and oxygen electrode 14.
  • the top interconnector 16A is electrically connected to the dimple protrusions (hydrogen side) 15A of the power generation layer 11A with a conductive adhesive 17, and the central interconnector 16B is electrically connected to the dimple protrusions (oxygen side) 15B of the power generation layer 11A with a conductive adhesive 19. Whether to apply the conductive adhesive 17 over the entire surface except for sealing portions 18 or at regions of a certain area that correspond to the respective protrusions 15A is determined in designing depending on the performance of the cell.
  • the coating area of the conductive adhesives 17 and 19 is determined based on an economical calculation of total factors such as a current price of the conductive adhesives 17 and 19.
  • each of the conductive adhesives 17 and 19 may be made of a material, such as platinum, that is different from the electrode material.
  • the respective members thus formed are assembled as shown in Fig. 3.
  • the output power can further be increased by arranging the assemblies of Fig. 3 vertically or horizontally.
  • a fuel such as H 2 is sufficiently diffused by the protrusions 15A while flowing between the interconnector 16A and the dimple outer surfaces.
  • oxygen (air) is di'ffused by the dimple protrusions 15B, ionized in the oxygen electrode 14, and passed through the solid oxide electrolyte 13.
  • the fuel reacts with the oxygen ions to produce electric energy.
  • Non-reacted fuel and oxygen (air) go out through outlets that are opposing to the inlets 20 and 21, respectively.
  • the inventors when examining the effect of the height (H) with a certain fixed diameter (D) of the dimple, the inventors have found that there is a range in which an increase in height causes a deterioration in performance. Further, it has been found that the solid oxide electrolyte 13 should be made thinner but excessive thinning causes only a little effect.
  • Fig. 2 (Enlarged cross-section of time along A-A in Fig. 1) shows definitions of the dimple height (H), dimple half pitch ((1/2)P) and dimple diameter (D).
  • the SOFC of the invention can provide a high power output in accordance with applications such as large-capacity power generation for land use, middle- or small-capacity power generation for cogeneration, and a power supply for use in a closed space which is required to be compact.
  • a fuel electrode 12, a solid oxide electrolyte 13 and an oxygen electrode 14, which constitute a power generation layer 11, are made of the following materials.
  • Fuel electrode 12 Ni/YSZ, NiCeO 2 /YSZ, and like materials; solid oxide electrolyte 13: YSZ; and oxygen electrode 14: LaSrMnO 3 , LaCoO 3 and like materials.
  • Interconnectors 16A to 16C are made of LaMgCrO 3 or Ni-based refractory alloys, for instance.
  • Fuel electrode 12 Ni/YSZ (60:40); solid oxide electrolyte 13: YSZ; oxygen electrode 14: LaSrMnO 3 ; interconnectors 16A to 16C: LaSrCrO,.
  • the particle diameters of materials used for the fuel electrode 12 and the oxygen electrode 14 were 1.95 ⁇ m and 2.45 ⁇ m, respectively.
  • the gas diffusion coefficient, i.e., (interstice ratio)/(bending degree) ⁇ / ⁇ in each of the electrodes was 0.02.
  • the degree of sintering, i.e., (sintering length)/(particle diameter), between each electrode and the solid oxide electrolyte 13 (YSZ) was 0.04.
  • the power generation atmosphere temperature of a cell accommodating the power generation layer 11 was 1,000°C. Further, humidified hydrogen and air were supplied to the fuel electrode 12 and the oxygen electrode 14, respectively.
  • Thickness of the fuel electrode 12 50 ⁇ m
  • thickness of the oxygen electrode 14 75 ⁇ m
  • diameter D of dimples 1.25 mm
  • height H of dimples 1.06 mm
  • half pitch (1/2)P of dimples 1.38 mm.
  • the YSZ thickness greatly influences the power output performance (power density). That is, it has been found that in the thickness range of the experiment, the power generation performance is improved as YSZ is made thinner.
  • the YSZ thickness was fixed at 100 ⁇ m and 200 ⁇ m in the following experiments in addition to the fact that the thicknesses of the fuel electrode 12 and the oxygen electrode 14 were made fixed parameters. Further, to facilitate the experiments for determining the optimum shape, the dimple half pitch ((1/2)P) was fixed at 1.85 mm instead of the above-mentioned value of 1.38 mm.
  • the parameters for determining the shape were set as follows.
  • the two graphs show the same tendency in performance. That is, while the YSZ thickness changes absolute values of the performance, it causes almost no changes in the influences of such factors as the dimple diameter (D) and the dimple height (H). Although the dimple diameter (D) cannot physically exceed the half pitch ((1/2)P), it is desired that the former be closest to the latter.
  • Equation (1) has been obtained as an equation for approximately providing maximum performance.
  • (dimple height (H)) 3.2 x (dimple diameter (D) - (dimple half pitch (1/2)P)
  • the gas flows and the pressure loss are influenced by whether the ratio between the diameter and the half pitch should be increased and the pitch reduced to obtain a large power output or, conversely, the ratio between the diameter and the half pitch should be reduced and the pitch increased.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Electrochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Fuel Cell (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
  • Inert Electrodes (AREA)

Claims (1)

  1. Festoxidelektrolyt-Brennstoffzelle mit einer Grübchenstruktur-Energieerzeugungsschicht (11), die drei Schichten aus einer Brennstoffelektrode (12), einem Festoxidelektrolyten (13) und einer Sauerstoffelektrode (14) aufweist, wobei beide Flächen der Grübchenstruktur-Energieerzeugungsschicht (11) mit einer Vielzahl von Grübchen (dimples) (15A, 15B) geformt sind,
       dadurch gekennzeichnet, daß die Grübchen (15A, 15B) so geformt und angeordnet sind, daß sie den folgenden Bedingungen genügen: H = 3,2 x D - 0,5 x P ± D und D / 0,5 x P ≥ 0,68, worin bedeuten:
    H = Grübchenhöhe,
    D = Grübchendurchmesser,
    P = Grübchenmittenabstand.
EP94118061A 1993-11-19 1994-11-15 Festoxidelektrytbrennstoffzelle Expired - Lifetime EP0654839B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP29026693A JP3486213B2 (ja) 1993-11-19 1993-11-19 固体電解質型燃料電池
JP290266/93 1993-11-19

Publications (2)

Publication Number Publication Date
EP0654839A1 EP0654839A1 (de) 1995-05-24
EP0654839B1 true EP0654839B1 (de) 1998-03-11

Family

ID=17753920

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94118061A Expired - Lifetime EP0654839B1 (de) 1993-11-19 1994-11-15 Festoxidelektrytbrennstoffzelle

Country Status (5)

Country Link
US (1) US5480737A (de)
EP (1) EP0654839B1 (de)
JP (1) JP3486213B2 (de)
AU (1) AU659781B1 (de)
DE (1) DE69408940T2 (de)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5702837A (en) * 1996-02-05 1997-12-30 Alliedsignal Inc. Bonding materials for anode to anode bonding and anode to interconnect bonding in solid oxide fuel cells
US6835488B2 (en) * 2000-05-08 2004-12-28 Honda Giken Kogyo Kabushiki Kaisha Fuel cell with patterned electrolyte/electrode interface
US6818338B2 (en) * 2000-05-08 2004-11-16 Honda Giken Kogyo Kabushiki Kaisha Fuel cell assembly
JP4956870B2 (ja) * 2001-06-11 2012-06-20 トヨタ自動車株式会社 燃料電池および燃料電池の製造方法
US20050003262A1 (en) * 2003-07-02 2005-01-06 Rajiv Doshi Solid-state fuel cell and related method of manufacture
US20070184322A1 (en) * 2004-06-30 2007-08-09 Hong Huang Membrane electrode assembly in solid oxide fuel cells
US20060008696A1 (en) * 2004-06-30 2006-01-12 Suk-Won Cha Nanotubular solid oxide fuel cell
US7303833B2 (en) * 2004-12-17 2007-12-04 Corning Incorporated Electrolyte sheet with a corrugation pattern
JP2007008778A (ja) * 2005-07-01 2007-01-18 Chubu Electric Power Co Inc セラミックス材料、酸素電極材料、酸素電極ならびに燃料電池およびその製造方法
US7603729B2 (en) * 2005-10-07 2009-10-20 Conmedisys, Inc. Patient lift and transfer device
US20070134540A1 (en) * 2005-12-12 2007-06-14 General Electric Company Solid oxide electrochemical devices having a dimensionally stable bonding agent to bond an anode to anode interconnect and methods
JP2008050222A (ja) * 2006-08-25 2008-03-06 Ngk Insulators Ltd セラミックス薄板体
CN102349184B (zh) * 2009-03-25 2014-02-12 株式会社日本触媒 固态氧化物型燃料电池用电解质片及其制备方法以及固态氧化物型燃料电池用单体电池
US20110174242A1 (en) * 2010-04-09 2011-07-21 Mcconahay Fred E Cylindrical hydrogen fuel generator having tubular cells with microscopic indentations
GB2504090A (en) * 2012-07-16 2014-01-22 Donald John Smith A device for generating hydrogen from water using centrifugal electron exchange
US10431841B2 (en) * 2014-11-18 2019-10-01 Lg Chem, Ltd. Method for manufacturing solid oxide fuel cell

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2841340B2 (ja) * 1989-03-25 1998-12-24 東燃料株式会社 固体電解質燃料電池
US5145753A (en) * 1989-09-12 1992-09-08 Mitsubishi Jukogyo Kabushiki Kaisha Solid electrolyte fuel cell
JP2599810B2 (ja) * 1990-04-24 1997-04-16 ワイケイケイ株式会社 固体電解質燃料電池
JPH0767375B2 (ja) * 1990-04-25 1995-07-26 明星食品株式会社 ▲麺▼類の保存方法
JP2584570Y2 (ja) * 1990-05-08 1998-11-05 三菱重工業株式会社 固体電解質型燃料電池
JP2989223B2 (ja) * 1990-06-22 1999-12-13 三菱重工業株式会社 平板型固体電解質燃料電池発電装置
JP3145522B2 (ja) * 1993-01-18 2001-03-12 三菱重工業株式会社 固体電解質型燃料電池

Also Published As

Publication number Publication date
EP0654839A1 (de) 1995-05-24
JPH07142071A (ja) 1995-06-02
AU659781B1 (en) 1995-05-25
US5480737A (en) 1996-01-02
DE69408940D1 (de) 1998-04-16
DE69408940T2 (de) 1998-08-13
JP3486213B2 (ja) 2004-01-13

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